Winding and setting mechanism for watches.



PATENTED JUNE 4, 1907.

H. SANDOZ. WINDING AND SETTING MECHANISM FOR WATCHES.

APPLIOATION TILED SEPT. 5, 1905.

ms Noluus PETERS cm. wxskmaron, D.c.

HENRI SANDOZ, OF TAVANNES, SWITZERLAND.

WINDING AND SETTING MECHANISM FOR WATCHES.

Specification of Letters Patent.

Patented. June 4, 1907.

Application filed September 5,1905. Serial No. 277,125.

(11M whom it may concern:

Be it known that I, HENRI SANDoZ, watchmaker, residing at Tavannes,Canton of Bern, Switzerland, and a citizen of Switzerland, have inventeda new and useful Improvement in a Finding and Setting Mechanism forWatches; and I do hereby declare the fol lowing to be a full, clear, andexact description of the same.

This invention relates to improvements in watches and more specially tothat portion which has to do with the winding and setting of the watch,the invention having for its object the provision of a device wherebythe winding stem may be alternatively thrown into operative engagementwith the winding and setting train thereof.

The invention has for a further object the provision of improvedmechanism of this character wherein the number of operative parts isreduced and the operation simplified and made more responsive andefiective.

To this end the invention consists in the provision of a vascule or yokepivotally mounted. in the movement and carrying on its free ends wheelsadapted, when the yoke is rocked, to be thrown into mesh with thewinding and setting trains, both of the pinions being operativelyconnected with the winding stem.

The invention also includes arocking member connected with the windingstem and the yoke in such a manner as to rock the latter uponreciprocation of the former and said yoke is provided with cam rockingand looking surfaces adapted to be engaged by said member to rock andlock the yoke in one of its positions. There is provided a bearing forthe winding stem together with stop projections on the yoke adapted toengage said bearing to limit the movement of the yoke in oppositedirections which in connection with a spring engaging the yoke forms thecombination constituting the present invention.

The invention will be described more fully in connection with theaccompanying drawing and will be more particularly pointed out andascertained in and by the appended claims.

In the drawings: Figure 1 is a diagrammatic sectional view of a watch orclock movement showing the device of my invention applied thereto. Fig.2 is a section on line A B of Fig. 1 showing the setting and windingtrains removed.

As shown the winding train is indicated at a and the setting train at 1)each suitably mounted on the pillar plate 9 of the casing b. A Windingstem f is shown mounted at its lower end in a pillar block 29 the saidstem projecting upwardly into and through the pendant in the usualmanner, the crown and the connection of the stem therewith not beingshown, The said stem f is provided with shoulders between which isformed an annular recess a for a urpose which will be hereinafterdescribec said stem being shown square in cross section at its lower endand having sliding and non-rotating engagement with a stem pinion 0.Said pinion and stem are each rotatively mounted in the pillar p and theconnection of the stem and pinion permits the former to be raised andlowered by the crown for the hereinafter described purpose.

A yoke iis pivoted centrally of its ends to the pillar plate Q or to anyconvenient sta tionary part of the movement, preferably upon a bearing7c which also carries a crown wheel Z. Said wheel Z meshes with the stempinion 0 and supports the same in the pillar 1). The yoke 'i is providedwith wings 4L and 71 the inner faces of which perform the function ofstop projections by engaging the pillar p limiting the rocking movementof the yoke i. The wing "L is provided with a cam rocking surface h anda cam locking surface 8 adapted to be engaged by movable member aconsisting preferably of a bell crank, one arm 9 thereof engaging thecam surfaces and the other arm at engaging the recess a in the windingstem. The yoke i carries pinions m and n which mesh with the pinion Zand which are operated therethrough by the winding stem. The yoke 'L isso located with respect to the winding and setting trains that thepinions m and n are respectively alternately thrust into engagement withthe pinions o and u when the yoke iis rocked upon its pivot, the saidyoke engaging the pillar p to limit the rocking movement of the yoke,thereby avoiding injury of the teeth of the meshing pinions.

In devices of this nature it is the practice to operatively connect thewinding stem and winding train when the parts are in a normal positionandto this end there is provided a spring t which normally engages theyoke i on the left hand side thereof, serving to hold the parts in theposition shown in full lines.

The operation will be obvious of the foregoing but may be briefly statedto be as follows: Assuming that the user wishes to set the hands of thewatch and shift the parts from the winding position as shown in fulllines to the setting position as shown in dotted lines, he will graspthe crown and reciprocate the winding stem bodily in an upwarddirection, which action will cause the lower arm 9 of the bell crank toslide up on the cam surface it and rock the yoke "i against the actionof the spring t, in a contra-clockwise direction. When the arm g engagesthe surface 8 it will seat therein and hold the parts in a settingposition with the pinion m in mesh with the setting pinion 1) thusleaving the operator free to rotate the stem and set the hands withoutat the same time pulling outwardly on the stem. WVhen it is desired toagain throw the yoke into a winding position it will merely be necessaryto apply a quick downward pressure to the crown in a manner to force thearm 9 out of the cam surface s whereupon the spring t will automaticallyrock the yoke into the position shown in full lines.

The device of my invention reduces the number of parts in mechanism ofthis character to a minimum and affords in quicl re sponsive andeffective means for perforn'iing the functions described.

I claim An improved winding and setting mechanism comprising incombination a rocking yoke provided with rocking and locking camsurfaces and stop projections, pinions mounted on said yoke and adaptedto be alternately thrust into mesh with winding and dial wheels, a crownwheel meshing with said pinions, a stem pinion meshing with said crownwheel, a slidably mounted stem nonrotatively and. slidably engaging saidstem pinion, a bearing for said stem adapted to be engaged by said stopprojections, means normally holding said. yoke in a winding position,and a rocking lever cooperating with said rocking and locking camsurfaces to rock and lock the yoke into a setting position.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

HENRI SANDOZ.

itnesses I ARMAND PERRELET, PHILIPPE BEGUI

